We look at the division of 583709 by 80 
The aim is to understand the frequency of 80 in 583709.

Going ahead to step 1:
5 divided by 80 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 80

Going ahead to step 2:
58 divided by 80 is 0 with a remainder of 58.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 58 leaves us with 58.
Include the next digit (3) from the dividend after 58, then repeat: 583 / 80

Step 3:
If we divide 583 by 80, we get 7 and a remainder of 23.
Put 7 as the next digit of the answer. 
Result so far: 7.0
The remainder is 23 after subtracting 560 from 583.
Take the next digit (7) from the dividend and append it to 23, then repeat: 237 / 80

Going ahead to step 4:
The number 80 fits into 237 2 times, leaving a remainder of 77.
The next digit of our result is 2. 
Result so far: 72.0
Subtracting 160 from 237 leaves us with 77.
Append the next digit (0) from the dividend to 77 and continue with: 770 / 80

Going ahead to step 5:
The number 80 fits into 770 9 times, leaving a remainder of 50.
Use 9 as the next digit of our solution. 
Result so far: 729.0
Subtract 720 from 770 to get 50.
Bring next digit (9) of the dividend behind the 50 and repeat the process: 509 / 80

Step 6:
When dividing 509 by 80, we get 6 with a remainder of 29.
Put 6 as the next digit of the answer. 
Result so far: 7296.0
Subtracting 480 from 509 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 7:
290 divided by 80 is 3 with a remainder of 50.
Write down 3 as next digit of the result. 
Result so far: 7296.3
If we subtract 240 from 290, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 8:
80 goes into 500 6 times with a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 7296.36
The remainder is 20 after subtracting 480 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
200 divided by 80 is 2 with a remainder of 40.
Put 2 as the next digit of the answer. 
Result so far: 7296.362
Subtracting 160 from 200 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 10:
If we divide 400 by 80, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 7296.3625
If we subtract 400 from 400, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 11:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 7296.3625
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 12:
When dividing 0 by 80, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 7296.3625
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 7296.3625 and a remainder of 0.0.